<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <!-- 添加商品提示 -->

      <el-alert
        center
        title="添加商品信息"
        type="info"
        show-icon
        :closable="false"
      >
      </el-alert>

      <!-- 添加商品步骤 -->
      <el-steps :active="active - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- 添加商品主体 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="tabPosition"
          v-model="active"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                expandTrigger="hover"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              v-for="(item, i) in manyTableData"
              :key="i"
              :label="item.attr_name"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  :label="cb"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              v-for="item in onlyTableData"
              :key="item.attr_id"
              :label="item.attr_name"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- on-preview预览时触发 list-type图片预览展示类型 -->
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
              :limit="3"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑 -->
            <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
            <el-button type="primary" class="btnAdd" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览框 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="50%"
    >
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from "lodash";

export default {
  data() {
    return {
      // 添加商品的步骤index
      active: "0",
      // 侧边栏的方向
      tabPosition: "left",
      // 添加商品的表单数据对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        //上传图片的数组
        pics: [],
        // 商品详情描述(介绍)
        goods_introduce: "",
        attrs: [],
      },
      // 表单规则
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" },
        ],
      },
      // 商品列表
      cateList: [],
      // 级联选择框的参数
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      //   动态参数列表
      manyTableData: [],
      // 静态参数列表
      onlyTableData: [],
      // 上传图片的url地址
      uploadUrl: "http://www.ysqorz.top:8888/api/private/v1/upload",
      // 图片上传组件的headers请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem("token"),
      },
      // 预览图片地址
      previewPath: "",
      // 预览图片框的显示与隐藏
      previewDialogVisible: false,
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    //获取所有商品分类
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200)
        return this.$message.error("获取商品分类失败");
      this.cateList = res.data;
    },
    // 级联选择器选中项变化,触发函数
    handleChange() {
      // 只允许三级分类
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请选择商品分类");
        return false;
      }
    },
    // 切换tab标签时触发函数
    async tabClicked() {
      if (this.active === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: "many",
            },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败");
        }
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length !== 0 ? item.attr_vals.split(",") : [];
        });
        this.manyTableData = res.data;
      } else if (this.active === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: "only",
            },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态参数列表失败");
        }
        this.onlyTableData = res.data;
        console.log(res.data);
      }
    },
    // 处理图片预览效果函数
    handlePreview(file) {
      console.log(file);
      this.previewPath = file.response.data.url;
      this.previewDialogVisible = true;
    },
    // 点击删除图片时触发
    handleRemove(file) {
      const filePath = file.response.data.tmp_path;
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath);
      this.addForm.pics.splice(i, 1);
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      const picInfo = { pic: response.data.tmp_path };
      this.addForm.pics.push(picInfo);
      console.log(this.addForm);
    },
    // 添加商品
    async add() {
      this.$refs.addFormRef.validate((valid) => {
        if (!valid) {
          return this.$message.error("请填写必要的表单");
        }
      });
      const form = _.cloneDeep(this.addForm);
      form.goods_cat = form.goods_cat.join(",");
      this.manyTableData.forEach((item) => {
        const newInfo = {
          attr_id: item.attr_id,
          attr_value: item.attr_vals.join(","),
        };
        this.addForm.attrs.push(newInfo);
      });
      this.onlyTableData.forEach((item) => {
        const newInfo = {
          attr_id: item.attr_id,
          attr_value: item.attr_vals,
        };
        this.addForm.attrs.push(newInfo);
      });
      form.attrs = this.addForm.attrs;
      const { data: res } = await this.$http.post("goods", form);
      if (res.meta.status !== 201) {
        return this.$message.error("添加商品失败");
      }
      this.$message.success("添加商品成功");
      this.$router.push('/goods')
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>